(1) Non-uniformity of low-melting fiber and conventional fiber blending: Different fibers have different cohesion. Generally speaking, low-melting fibers have greater cohesion than conventional fibers and are less likely to disperse. If the low-melting-point fibers are unevenly dispersed and the low-melting-fiber content is small, the Breathable Nonwoven Fabrics are thinner and relatively thicker than the low-melting fiber.

(2) Incomplete melting of low-melting fiber: Incomplete melting of low-melting fiber, the main reason is insufficient temperature. For non-woven fabrics with low basis weight, it is generally not easy to cause insufficient temperature, but for high basis weight, high-thickness products require special attention. The non-woven fabric at the edge has a thick heat, and the non-woven fabric is usually thick. The non-woven fabric in the middle portion is less likely to form a thinner non-woven fabric because of the heat.

(3) High shrinkage of fiber: Whether it is conventional fiber or low-melting fiber, if the hot air shrinkage rate of the fiber is high, the problem of uneven thickness is likely to occur due to the shrinkage problem during the production of Flexible Non Woven Fabrics.